Lighting-fixture.



P. W. WAKEFIELD.

LIGHTING FIXTURE.

APPLICATION FILED MAE. 2, 19m.

71, ,943 Patented Oct. 4, 1910.

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F. W. WAKEFIELD.

LIGHTING FIXTURE.

APPLIOATION FILED mum, 1910.

971,943. Patented Oct. 4, 1910.

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FREDERICK W. XYAKEFIELD, 0F VERMILION, OHIO.

LIGHTING-FIXTURE.

Specification of Letters Patent.

Patented Oct. 4, 1910.

Application filed March 2, 1910. Serial No. 546,793.

To all whom it may concern:

Be it known that I, FREDERICK l/V. VVAKE- FIELD, a citizen of the United States, and a resident of Vermilion, county of Erie, and State of Ohio, have invented a new and useful Improvement in Lighting-Fixtures, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates in general to lighting fixtures, and has particular relation to the provision of an improved arm, such as is inserted in a fixture body.

The general object of this invention is the provision of such an arm, which may be simply and inexpensively manufactured, which will render assembling and wiring of the arm extremely easy, and which will obviate any possibility of danger after instaliatlon. An arm of this general character is described in my co-pending application, Serial No. 516,418, filed September 7, 1909, and the present invention is an in'iprovement upon the terminal of the arm illustrated in such application.

The annexed drawing and the follmving description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In the annexed drawings :-Figure 1 is a side elevation of a broken arm embodying my invention; Fig. 2 is a vertical section thereof; Figs. 3 and 4 are respectively bottom and top plans of such arm; Fig. 5 is a perspective View of a plate forming a part of the invention; Fig. 6 is a side elevation of a nipple entering into the invention; Fig. 7 is a vertical section of my invention as embodied in a cylindrical arm; Fig. 8 is a vertical section of a modified arm; Fig. 9 is a side elevation partly in section of a modified arm secured to a body; Fig. 10 is a top plan of a plate designed for use therewith; Fig. 11 is a side elevation of a nipple for use therewith; Fig. 12 is a top plan of the end of the arm; and Fig. 13 is a side elevation of a still further modified. nipple.

The invention as illustrated comprises primarily a hollow metallic arm 1 which is of rectangular cross section. This arm is formed on its bottom side with a longitudinal slot 2 and on its upper side such arm is formed with an upwardly extending projection or barb 3. The open end of the arm 1 is designed to be closed by a plate 4 which may be of any ornamental shape, but which extends across the open end of the arm, and inwardly over the top and bottom thereof. The bottom of the plate 4 is formed with a transversely extending slot 5 which is designed in the assembled condition of the parts to register with the slot 2 in the arm 1. In its top the plate 4 is formed with an opening 6 which is designed in such assembled condition to engage the projection 3 formed on the top of the arm. The chief element utilized in securing the plate 4 rigidly to the arm 1 is a nipple 7 which is formed at its top with a rectangular flange 8, and is formed below the flange 8 with a second flange 9, the lower end of this nipple being preferably threaded to receive a lamp socket.

The method of assembling the parts will be obvious from this description of the detailed elements. The nipple is first inserted in the transverse slot in the plate so that its flanges engage the sides of such slot. The plate and nipple are then united with the arm by sliding the nipple through the longitudinal slot in the arm, so that the under side of the arm and the plate are held between the two flanges of the nipple. hen the plate is pushed onto the arm so that the plate closely covers the outer end thereof, the upwardly bent projection in the top of the arm will engage the opening in the top of the plate, and the plate will then be very securely attached to the arm.

The advantages of this method of construction of an electric lighting fixture arm are of considerable practical importance. In constructing the fixture the lead wires may be easily inserted through the nipple and then through the arm before the parts are assembled, so that such wiring will be an easy matter. The terminal. plate and nipple, by reason of the slotted construction of the plate and arm, may then be securely attached to the arm by merely sliding them thereon. The squared inner flange of the nipple absolutely prevents rotation thereof and of the plate, while the projection and engaging aperture at the top of the structure adds to the general security of the attachment.

It is finally to be noted that a small screw may be substituted for the projection and hole in the top of the arm and plate, as in Fig. 8. l urthermore, although I have illustrated this terminal construction in its application to a rectangular arm, it will be understood that it may be equally well adapted to a cylindrical arm. hen it is applied to a cylindrical arm the inner flange of the nipple will be transversely curved to conform with the shape of the arm, so that rotation of the nipple and plate relatix'ely to the arm will be just as effectively prevented as in the device of the illustrations.

T his construction, therefore, may be very inexpensively produced, for the only parts required are the nipple and the stamped metal plate; the fixture may be very easily wired as the complete wiring may be done while the parts are in disassembled condition, and the wire need not be worked through twisted channels; and finally, after assembly and installation, the plate is securely held to the arm so that any danger from exposure of the wiring is rendered impossible.

Figs. 9, 10, 11 and 12 illustrate an arm and cooperative parts designed for use in a combination gas and electric fixture, or in one for use with gas alone. The arm 1 is here illustrated as secured to a body 10 which is formed by two clamp plates 11 and 12, between which the end of the arm is in serted, the plates being surrounded by casing plates provided with square apertures through which the arms extend. A gas pipe leads into a body, and a gas pipe 13, threaded into the body connects therewith and extends out through the arm 1. The outer end of arm 1 in this adaptation, is formed on the bottom with a longitudinal slot 2 as before, and is further provided on the top, or oppositely disposed side, with a similar longitudinal slot 14L. The plate 4, which is designed to close the end of the arm, is formed at the bottom with a transverse slot 5 as before, but on its top is provided with a similar slot 15, and in this form of the plate the two slots 5 and 15 are inclined so that when the plate is in position on the end of the arm these slots are angularly disposed wit-h relation to the end of the arm 1. The attaching nipple in this form of the fixture comprises a central portion 16 threaded on to the gas pipe 13, and above such portion is provided with a flange 17 and with a threaded portion 19 which is designed to receive the exterior gas cook and burner. Below the portion 16 is integrally formed a flange 18 and a threaded portion 20 designed to receive an electric lamp socket, while the portion 16 is recessed immediately above the threaded portion 20. Fig. 13 illustrates a nipple for use in a fixture designed for use with gas alone, in which the lower threaded extension for the attachment of an electric socket is not required.

In assembling the parts the gas pipe 13 with the nipple is inserted through the arm so that the flanges and central portion of the nipple engage the sides of the longitudinal slots in the arm. The gas pipe is then screwed into the body whereupon the arm is thrust inwardly so that its inner end extends into the body through the casing plate. The closing plate is then applied to the outer end of the arm so that the transverse slots embrace the nipple between its flanges and the arm. The arm is then pulled outwardly against the end of the closing plate and the two body plates are clamped to secure the inner end of the arm,

.whereupon the fixture is in completely assembled condition. hen they are in such condition it is impossible to remove the outer plate from the end of the arm. The nipple and the transverse end of the arm are in relatively fixed position and as the transverse slots in the closing plate are inclined with respect of the end of this arm, with the open ends of the slots outermost, the fixed end of the arm securely locks the closing plate in engaging position on the nipple. In order to disassemble the fixture, the body plates must be loosened and the arm moved inwardly, whereupon the closing plate may be removed and the arm then moved outwardly as far as the longitudinal slots will allow. This limit of motion will be so figured that when the arm is thus moved outwardly, its inner end will be free of the aperture in the casing plate, and the gas pipe may be then unscrewed from the body. Although this fixture may be used with gas alone, it is usually used as a com bination fixture with a nipple provided also with a threaded portion to receive an electric lamp socket. In this case the recess above such threaded portion allows the wires to be easily pulled through such portion and threaded through the arm. If, however, the fixture is to be used for gas alone, instead of as a combination fixture, the lower part of the attaching nipple will be of no utility, and such nipple will preferably be of the form illustrated in Fig. 13.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed,

provided the means stated by any one of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinct-1y claim as my invention:

1. As a new article of manufacture, a lighting fixture arm provided at its outer end with a slot, a member extending across the outer end of said arm, and a nipple extending through said member and engaging the sides of said slot.

2. As a new article of manufacture, a lighting fixture arm provided at its outer end with a slot, a member extending across the outer end of said arm, and a nipple extending through said member and provided with flanges engaging the sides of said slot.

3. As a new article of manufacture, a lighting fixture arm provided at its outer end with a longitudinal slot, a member extending across the outer end of said arm and provided with a transverse slot, and a nipple extending through said slots and engaging the sides thereof.

4. As a new article of manufacture, a

lighting fixture arm provided at its outer end with a longitudinal slot, a member ex tending across the outer end of said arm and provided with a transverse slot, and a nipple extending through said slots and provided with flanges engaging the sides thereof.

' 5. As a new article of manufacture, a lighting fixture arm provided at its outer end with a slot and with a projection, a member extending across the outer end of said arm and provided with a hole engaging said projection, and a nipple extending through said member and provided with flanges engaging the sides of said slot.

6. As a new article of manufacture, a lighting fixture arm provided at its outer end with a longitudinal slot and with a projection, a member extending across the outer end of said arm, said member being provided with a transverse slot and with a hole engaging said projection, and a nipple extending through said slots and provided with flanges engaging the sides thereof.

7. As a new article of manufacture, a lighting fixture arm provided at its outer end with a longitudinal slot and with a projection, a sheet metal plate extending across the outer end of said arm, said plate being provided with a transverse slot and with a hole engaging said projection, and a nipple extending through said slots and provided with fianges engaging the sides thereof, said nipple having its outer end threaded.

8. As a new article of manufacture, a lighting fixture arm provided at its outer end with oppositely disposed longitudinal slots, a member extending across the outer end of said arm and provided with oppositely disposed transverse slots, and a nipple extending through said slots and engaging the sides thereof.

9. As a new article of manufacture, a lighting fixture arm provided at its outer end with oppositely disposed longitudinal slots, a member extending across the outer end of said arm and provided with oppositely disposed transverse slots, and a nipple extending through said slots and provided with flanges engaging the sides of said slots.

10. As a new article of manufacture, a lighting fixture arm provided at its outer end with oppositely disposed longitudinal slots, a member extending across the outer end of said arm and provided with oppositely disposed transverse slots, said trans verse slots being angularly disposed relatively to the end of the arm, and a nipple extending through said slots and provided with flanges engaging the sides thereof.

Signed by me this 26th day of Feb, 1910.

FREDERICK W. VAKEFIELD.

Attested by N. EARLE CHILns, E. L. CoEN. 

